Patent US4251997A successfully refreshed from Google Patents.
US4251997A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Control of absorption systems energized from plural storage tanks maintained at different temperatures
Assignee: York International Corp
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Filing: 1979-04-02
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Granted: 1981-02-24
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Expires: 1999-04-02
Abstract
Abstract An absorption refrigeration system is adapted to be energized by plural sources of a heating system stored at different temperatures. A control system automatically selects the proper source of supply to the generator in response to the temperatures of the heating medium of the plural sources and to the temperature of heated medium entering the generator. The temperature of heated medium entering the generator is dependent upon the respective temperatures of (1) the cooling water, used to cool the condenser and absorber coils, and (2) the chilled water supplied to the load, vary in response to changing conditions.
Inventors
- 👤 Alwin B. Newton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 14:37
CPC Classifications
F; F25; F25B; F25B27/00; F25B27/002; F25B27/007; F25B15/00; F25B49/00; F25B49/04; F25B49/043; Y; Y02; Y02A; Y02A30/00; Y02A30/27; Y02B; Y02B30/00; Y02B30/62
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
142 words
A control system for a closed circuit, continuous cycle absorption refrigeration machine of the type including a generator, a condenser, an absorber, and evaporator through which chilled water is circulated, and means for supplying a cooling fluid to the absorber and condenser, said control system comprising: means for storing heated fluids adapted for energizing the generator in a plurality of tanks at different temperatures: means for sensing the temperature of the heated fluid in at least one of the plurality of tanks; means for sensing the temperature of the heated fluid entering the generator; and means responsive to the comparison of the temperatures of the heated fluid in said plurality of tanks with the temperature of the heated fluid entering the generator for automatically selecting one of the plurality of tanks as the source of the heated fluid to energize the generator.
Claim 2
Dependent Claim
142 words
A control system for a closed circuit, continuous cycle absorption refrigeration machine of the type including a generator, a condenser, an absorber, and evaporator through which chilled water is circulated, and means for supplying a cooling fluid to the absorber and condenser, said control system comprising: means for storing heated fluids adapted for energizing the generator in a plurality of tanks at different temperatures: means for sensing the temperature of the heated fluid in at least one of the plurality of tanks; means for sensing the temperature of the heated fluid entering the generator; and means responsive to the comparison of the temperatures of the heated fluid in said plurality of tanks with the temperature of the heated fluid entering the generator for automatically selecting one of the plurality of tanks as the source of the heated fluid to energize the generator.
Claim 3
Dependent Claim
47 words
A control system as claimed in claim 1, further comprising means for modifying the maximum energizing temperature of the fluid entering the generator in the response to changes in the temperature of the cooling fluid and in the temperature of the chilled water circulated through the evaporator.
Claim 4
Dependent Claim
42 words
A control system as claimed in claim 1, further comprising means for controlling said selecting means during start-up of the refrigeration machine so that the source of the heated fluid to energize the generator is from the tank with the highest temperature.
Claim 5
Dependent Claim
132 words
An absorption refrigeration apparatus comprising: a generator, a condenser, an absorber, and an evaporator all connected in a closed circuit, continuous cycle system; means for supplying a cooling fluid to said absorber and to said condenser; means for storing heated fluids adapted for energizing the generator in a plurality of tanks at different temperatures; means for sensing the temperature of the heated fluid in at least one of the plurality of tanks; means for sensing the temperature of the heated fluid entering the generator; and means responsive to the comparison of the temperatures of the heated fluid in said plurality of tanks with the temperature of the heated fluid entering the generator for automatically selecting one of the plurality of tanks as the source of the heated fluid to energize the generator.
Claim 6
Dependent Claim
132 words
An absorption refrigeration apparatus comprising: a generator, a condenser, an absorber, and an evaporator all connected in a closed circuit, continuous cycle system; means for supplying a cooling fluid to said absorber and to said condenser; means for storing heated fluids adapted for energizing the generator in a plurality of tanks at different temperatures; means for sensing the temperature of the heated fluid in at least one of the plurality of tanks; means for sensing the temperature of the heated fluid entering the generator; and means responsive to the comparison of the temperatures of the heated fluid in said plurality of tanks with the temperature of the heated fluid entering the generator for automatically selecting one of the plurality of tanks as the source of the heated fluid to energize the generator.
Claim 7
Dependent Claim
46 words
An apparatus as claimed in claim 4, further comprising means for modifying the maximum energizing temperature of the heated fluid entering the generator in response to changes in the temperature of the cooling fluid and in the temperature of the chilled water circulated through the evaporator.
Claim 8
Dependent Claim
41 words
An apparatus as claimed in claim 4, further comprising means for controlling said selecting means during start-up of the refrigeration machine so that the source of the heated fluid to energize the generator is from the tank with the highest temperature.
Claim 9
Independent Claim
134 words
A method of operating a closed circuit, continuous cycle absorption refrigeration machine of the type including a generator, a condenser, an absorber, an evaporator through which chilled water is circulated, and means for supplying a cooling fluid to the absorber and condenser, said method comprising the steps of: storing heated fluids for energizing the generator in a plurality of tanks at different temperatures; sensing the temperature of the heated fluid in at least one of the plurality of tanks; sensing the temperature of the heated fluid entering the generator; and selecting one of the plurality of tanks as the source of heated fluid to energize the generator in response to the comparison of the temperatures of the heated fluid in the plurality of tanks with the temperature of the heated fluid entering the generator.
Claim 10
Independent Claim
134 words
A method of operating a closed circuit, continuous cycle absorption refrigeration machine of the type including a generator, a condenser, an absorber, an evaporator through which chilled water is circulated, and means for supplying a cooling fluid to the absorber and condenser, said method comprising the steps of: storing heated fluids for energizing the generator in a plurality of tanks at different temperatures; sensing the temperature of the heated fluid in at least one of the plurality of tanks; sensing the temperature of the heated fluid entering the generator; and selecting one of the plurality of tanks as the source of heated fluid to energize the generator in response to the comparison of the temperatures of the heated fluid in the plurality of tanks with the temperature of the heated fluid entering the generator.
Claim 11
Dependent Claim
47 words
A method as claimed in claim 7, further comprising the step of modifying the maximum energizing temperature of the heated fluid entering the generator in response to changes in the temperature of the cooling fluid and in the temperature of the chilled water circulated through the evaporator.
Claim 12
Dependent Claim
42 words
A method as claimed in claim 7, further comprising the step of controlling the selecting step during start-up of the refrigeration machine so that the source of the heated fluid to energize the generator is from the tank with the highest temperature.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-02-24 | 1984-08-25 | 1985-02-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-02-24 | 1988-08-25 | 1989-02-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-02-24 | 1992-08-25 | 1993-02-24 | $7700.00 | Window Closed / Lapsed |